Exotek XB2/XB4 Aluminum CVD Safety Collars are heavy duty aluminum CVD cups for the XRAY XB2 and XB4 2016 buggies. These cups improve durabilty when compared to the stock plastic cups, and with all three cups coming in at less than 1 gram, they are incredibly lightweight. Available in a polished black or factory orange anodized finish to add an extra touch of flash to your buggy. Each pack includes 3 cups. The XB4 requires 2 packs.